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1 L L 2. 1 R. 2 1 K K 3. 2 S. 2 1 T T 4. 8

1. P → 4; Q → 2; R → 1; S → 3
2. P → 3; Q → 2; R → 4; S → 1
3. P → 2; Q → 3; R → 1; S → 4
4. P → 2; Q → 3; R → 4; S → 1

Correct answer: P → 3; Q → 2; R → 4; S → 1

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